fix(integrations): openai-agents fixing the input messages structure which was wrapped too much in some cases

[constantinius]

Issues

Closes https://linear.app/getsentry/issue/TET-1551/openai-agents-broken-input-messages

[linear]

TET-1551 OpenAI Agents: broken input messages

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.20%. Comparing base (3eac23c) to head (86019f7).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5203   +/-   ##
=======================================
  Coverage   84.19%   84.20%           
=======================================
  Files         181      181           
  Lines       18442    18443    +1     
  Branches     3283     3283           
=======================================
+ Hits        15528    15530    +2     
  Misses       1899     1899           
+ Partials     1015     1014    -1     

Files with missing lines	Coverage Δ
sentry_sdk/integrations/openai_agents/utils.py	87.75% <100.00%> (+0.12%)	⬆️

... and 1 file with indirect coverage changes